摘要
利用波函数展开法,分析了爆破地震波与邻近圆形衬砌洞室的相互作用过程,推导了爆破地震波作用下圆形衬砌洞室围岩和衬砌的应力及位移表达式。以混凝土衬砌厚分别为0.5m和0.1m为例,求出了爆破地震波作用下围岩和衬砌周围的应力及振速分布。结合应力和振速分布及衬砌的抗拉强度,得到了2种厚度衬砌的临界破坏振速。研究表明衬砌厚度的增加可有效减小围岩中的最大应力;混凝土衬砌越薄,其临界峰值振速越小。
The wave function expansion method is used to analyze the interaction of blasting seismic wave and the adjacent underground chamber with lining, the stress and displacement expressions of surrounding rock mass and lining under the acting of blasting seismic wave are deduced. Taking the lining with thickness of 0.5 m and 0.1 m as the examples, the stress and vibration velocity distribution of surrounding rocks mass and lining are presented. In terms of the stress and vibration velocity distribution and the tension strength of the concrete lining, the critical failure vibration velocity of concrete lining in different thickness is obtained. The research results show the maximum stress in surrounding rock mass decreases with the increment of the thickness of lining, the thinner the concrete lining is, the less the critical failure vibration velocity is.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第1期91-94,98,共5页
Journal of Wuhan University of Technology
关键词
爆破振动
混凝土衬砌
临界振速
blasting vibration
concrete lining
critical failure vibration velocity
